Duck penises show battle of the sexes

Tuesday, 1 May 2007 Maggie FoxReuters

Female ducks, like the one in the foreground, have evolved clever ways of choosing which male to mate with. So, will the genitalia of this green-faced drake do the trick? (Image: iStockphoto)(Source: iStockphoto)

Related Stories

Ducks have evolved complicated genitals in what appears to be an 'arms race' between the sexes, researchers report, and females may be coming out ahead.

The findings not only open a window into a little-studied area of biology, but could help shed light on how evolution works to help both males and females control their own breeding, the US and UK researchers say.